Abstract
A positive parity sequence of ΔI=2 γ transitions has been identified above Iπ=9/2+ state (Ex=2019 keV) in 115Sb through in-beam γ ray spectroscopic technique. Rotational features of this sequence are found similar to a low-K decoupled band. Observation of this newly identified low-K decoupled band, along with the earlier reported strongly coupled high-K band in this nucleus, provides the first experimental evidence for prolate-oblate shape coexistence associated with g9/2 proton-hole configuration around Z=50 shell closure. Experimental results are reproduced reasonably well in the frameworks of the projected shell model and the total Routhian surface calculations.
Original language | English |
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Article number | 138565 |
Journal | Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics |
Volume | 851 |
DOIs | |
State | Published - 1 Apr 2024 |
Externally published | Yes |
Keywords
- High-K
- INGA
- Low-K
- PSM
- Shape coexistence
ASJC Scopus subject areas
- Nuclear and High Energy Physics